UFT President Michael Mulgrew says while 10% of schools are produced college-ready students, the vast majority of schools are struggling without any help.

It isn't easy to graduate prepared for college — unless you come from one of the city’s select high schools, according to a new report released by the United Federation of Teachers.

The analysis reveals that just 10% of city schools produce nearly half the students who graduate college-ready by state standards.

That means an elite group of 35 high schools contributes to a disproportionate number of students ready for college — about 8,000 of the city’s roughly 16,000 seniors.

“It’s a tale of two school systems,” said teachers union president Michael Mulgrew. “The rest of the schools are struggling — and Mayor Bloomberg hasn’t done anything to help them out.”

Familiar names like Bronx High School of Science, Stuyvesant High School, Brooklyn Technical High School and Fiorello H. LaGuardia High School of Music and Art are included in the list of schools that churn out rising university stars.

But disparities exist among those as well — while Bronx Science has a 99% state college-ready rate, Frank Sinatra School of the Arts in Queens only graduates 46% of its students prepared, according to state data.

State college-ready standards take into account only Regents exam grades, while city standards also include scores on the SAT and other college assessments.

State Board of Regents Chancellor Merryl Tisch said she was disheartened by the disproportionate college readiness rates — and plugged the new, more difficult Common Core standards as a benchmark of improvement.

“We will know we are being successful with the implementation of Common Core if we see that the number of college- and career-ready students is more evenly disbursed throughout the system,” Tisch said. “Even though it makes us uncomfortable to look at these numbers, let’s use them as a clarion call to action.”

The union’s analysis shows a stark divide still exists among the city’s 352 schools with graduating seniors, despite efforts to boost the college-readiness rate.

Nearly two weeks ago, city officials announced the college-readiness rate rose to 22.2% in 2013 from 21.1% for the graduating class of 2012.

The rate is even lower for minorities — 13% for black students and 15% for Latinos.

But officials frequently tout the progress made in lowering the achievement gap.

“A decade ago, we inherited a broken system that we’ve brought into the 21st century,” said Education Department spokesman Devon Puglia.

“We’ve virtually doubled the number of college-ready students since 2005, as we’ve created 656 new, high-performing options across the five boroughs,” he continued. “We can’t turn back the clock on our students by rolling back the reforms that have produced remarkable results.”

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